Clinico-genomic findings, molecular docking, and mutational spectrum in an understudied population with breast cancer patients from KP, Pakistan.

In this study, we report the mutational profiles, pathogenicity, and their association with different clinicopathologic and sociogenetic factors in patients with Pashtun ethnicity for the first time. A total of 19 FFPE blocks of invasive ductal carcinoma (IDC) from the Breast Cancer (BC) tissue and 6 normal FFPE blocks were analyzed by whole-exome sequencing (WES). Various somatic and germline mutations were identified in cancer-related genes, i.e., ATM, CHEK2, PALB2, and XRCC2. Among a total of 18 mutations, 14 mutations were somatic and 4 were germline. The ATM gene exhibited the maximum number of mutations (11/18), followed by CHEK2 (3/18), PALB2 (3/18), and XRCC2 (1/18). Except one frameshift deletion, all other 17 mutations were nonsynonymous single-nucleotide variants (SNVs). SIFT prediction revealed 7/18 (38.8%) mutations as deleterious. PolyPhen-2 and MutationTaster identified 5/18 (27.7%) mutations as probably damaging and 10/18 (55.5%) mutations as disease-causing, respectively. Mutations like PALB2 p.Q559R (6/19; 31.5%), XRCC2 p.R188H (5/19; 26.31%), and ATM p.D1853N (4/19; 21.05%) were recurrent mutations and proposed to have a biomarker potential. The protein network prediction was performed using GeneMANIA and STRING. ISPRED-SEQ indicated three interaction site mutations which were further used for molecular dynamic simulation. An average increase in the radius of gyration was observed in all three mutated proteins revealing their perturbed folding behavior. Obtained SNVs were further correlated with various parameters related to the clinicopathological status of the tumors. Three mutation positions (ATM p. D1853N, CHEK2 p.M314I, and PALB2 p.T1029S) were found to be highly conserved. Finally, the wild- and mutant-type proteins were screened for two drugs: elagolix (DrugBank ID: DB11979) and LTS0102038 (a triterpenoid, isolated from the anticancer medicinal plant Fagonia indica). Comparatively, a higher number of interactions were noted for normal ATM with both compounds, as compared to mutants.

Prevalence of crimean Congo hemorrhagic fever in Khyber Pakhtunkhwa, Pakistan.

BACKGROUND: CCHFV is well recognized as a major public health threat and its prevalence and epidemiological distribution in Pakistan and specifically in KP province is not well documented. METHODS: We used a gold-standard PCR-based diagnostic assay for confirmation of CCHFV among suspected patients. A total of 150 patients were enrolled from June 2022 to September 2022 and their blood samples were collected for PCR confirmation. RESULTS: The overall positivity rate for CCHFV was 26.67 %, with the virus mostly prevalent in the middle-aged group (21-40 years). In the July of 2022, a significant spike in the prevalence of CCHFV was observed in provincial capital Peshawar with the highest burden (31.57 %). CONCLUSION: Our findings indicate the necessity of strengthening CCHFV monitoring programs and intensifying efforts to identify hotspot regions for effective surveillance and control of CCHFV. The months before the Eid-ul-Adha are crucial in the context of CCHFV control.

Preliminary insights on the mutational spectrum of BRCA1 and BRCA2 genes in Pakhtun ethnicity breast cancer patients from Khyber Pakhtunkhwa (KP), Pakistan.

Gene mutations are a source of genetic instability which fuels the progression of cancer. Mutations in BRCA1 and BRCA2 are considered as major drivers in the progression of breast cancer and their detection indispensable for devising therapeutic and management approaches. The current study aims to identify novel pathogenic and recurrent mutations in BRCA1 and BRCA2 in Pakhtun population from the Khyber Pakhtunkhwa. To determine the BRCA1 and BRCA2 pathogenic mutation prevalence in Pakhtun population from KP, whole exome sequencing of 19 patients along with 6 normal FFPE embedded blocks were performed. The pathogenicity of the mutations were determined and they were further correlated with different hormonal, sociogenetic and clinicopathological features. We obtained a total of 10 mutations (5 somatic and 5 germline) in BRCA1 while 27 mutations (24 somatic and 3 germline) for BRCA2. Five and seventeen pathogenic or deleterious mutations were identified in BRCA1 and BRCA2 respectively by examining the mutational spectrum through SIFT, PolyPhen-2 and Mutation Taster. Among the SNVs, BRCA1 p.P824L, BRCA2 p. P153Q, p.I180F, p.D559Y, p.G1529R, p.L1576F, p.E2229K were identified as mutations of the interaction sites as predicted by the deep algorithm based ISPRED-SEQ prediction tool. SAAFEQ-SEQ web-based algorithm was used to calculate the changes in free energy and effect of SNVs on protein stability. All SNVs were found to have a destabilizing effect on the protein. ConSurf database was used to determine the evolutionary conservation scores and nature of the mutated residues. Gromacs 4.5 was used for the molecular simulations. Ramachandran plots were generated using procheck server. STRING and GeneMania was used for prediction of the gene interactions. The highest number of mutations (BRCA1 7/10, 70 %) were on exon 9 and (BRCA2, 11/27; 40 %) were on exon 11. 40 % and 60 % of the BRCA2 mutations were associated Grade 2 and Grade 3 tumors respectively. The present study reveals unique BRCA1 and BRCA2 mutations in Pakhtun population. We further suggest sequencing of the large cohorts for further characterizing the pathogenic mutations.

Insight into the molecular mechanism, cytotoxic, and anticancer activities of phyto-reduced silver nanoparticles in MCF-7 breast cancer cell lines.

This contribution insight on the cytotoxic and anticancer activities and molecular mechanism of phyto-reduced silver nanoparticles (AgNPs) in MCF-7 breast cancer cell lines. A simple, entirely green synthesis process was optimized for the phyto-reduction of AgNP (~12.7 nm) using aqueous leaf extracts of Indigofera heterantha. The structural and vibrational properties of biosynthesized AgNPs were extensively characterized using UV-Vis spectrophotometer, x-ray diffraction (XRD), dynamic light scattering (DLS), and Fourier transform Infrared spectroscopy (FTIR), while their shape and morphology was studied through scanning electron microscopy (SEM). The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) cell viability assay indicates concentration dependent inhibition with IC50, 27.93 ± 2.10 µg/mL against MCF-7 cells and 294.38 ± 3.87 µg/mL against L929 cells. The manifested anticancer mechanism in MCF-7 cells was extensively studied using Acridine orange/ethidium bromide (AO/EB), 4',6-diamidino-2-phenylindole (DAPI) and Annexin-V/propedium iodide fluorescence microscopic assays. The level of reactive oxygen species (ROS) was measured using DCFH-DA fluorescent spectroscopy. Overall, the results show that AgNPs exhibit cytotoxic and apoptotic effect on breast cancer MCF-7 cells by damaging membrane integrity and nuclear fragmentation due to oxidative stress generated by elevated level of ROS. RESEARCH HIGHLIGHTS: Biomimetic synthesis of nano dimension size silver nanoparticles (AgNPs). Characterization of AgNPs through UV-Vis, DLS, XRD, FTIR, and SEM. Cytotoxic and anticancer effects of the biosynthesized AgNPs in L929 fibroblast cells and MCF7 breast cancer respectively. Determination of morphological, and nuclear changes triggered by AgNPs in MCF 7 breast cancer cells using fluorescent microscopy and flow cytometry. Apoptosis induction by AgNPs in cancer cells through oxidative stress generated by reactive oxygen species (ROS).

Personal Health Planning in Adult-Child Former Caregivers of Parents Living With Dementia.

PURPOSE: To examine how former caregivers for parents living with dementia engage in personal health planning. DESIGN: An inductive, qualitative study. SETTING: Virtual, audio-recorded, semi-structured interviews. PARTICIPANTS: Thirty-two midlife former primary caregivers for parents who died following advanced dementia 3 months to 3 years prior. METHOD: Participants responded to a series of open-ended interview prompts. Interview recordings were transcribed and evaluated by a trained, diverse team to generate Consensual Qualitative Research (CQR) domains and categories. RESULTS: Caregivers developed health planning outlooks (ie, mindsets regarding willingness and ability to engage in personal health planning) that guided health planning activities (ie, engaging in a healthy lifestyle, initiating cognitive/genetic testing, maintaining independence and aging in place, ensuring financial and legal security). An agentic outlook involved feeling capable of engaging in health planning activities and arose when caregivers witnessed the impact and feasibility of their parents' health planning. Anxiety-inducing and present-focused outlooks arose when caregivers faced barriers (eg, low self-efficacy, lack of social support, perception that parent's health planning did not enhance quality of life) and concluded that personal health planning would not be valuable or feasible. CONCLUSION: Caregiving for a parent living with dementia (PLWD) shapes former caregivers' personal health planning. Interventions should support former caregivers who have developed low self-efficacy or pessimistic views on healthy aging to support them in addressing health planning activities.

Former dementia caregivers' high and low point narratives: what is remembered, and how is it shared?

OBJECTIVES: To characterize core themes conveyed by caregivers when sharing narratives of high and low caregiving points and to describe how caregivers structured these narratives. METHODS: Using consensual qualitative research and thematic analysis, high and low point narratives from 32 former caregivers of persons living with dementia were examined. RESULTS: High point narrative themes involved strengthening relationships with care partners, fulfillment derived from care, lighthearted moments, and fostering the care partners' joy and dignity. Low point narratives involved family conflict and lack of support, personal deficiencies, loss of the caregivers' 'pre-caregiving' life, health system failures, and alienation from their care partner. Across high and low points, caregivers' narratives were structured by three types of narrative elaborations; details unnecessary for factual recall but which enriched narrative sharing. CONCLUSION: Themes across high and low point narratives encompassed relational issues, how caregiving shaped the caregiver's self-efficacy, and factors that made navigating caregiving easier or more difficult. Both high point and low point narration often involved describing positive aspects of caregiving (PAC). Narrative elaborations may be used by former caregivers to engage in deeper evaluation of their caregiving experiences. We consider how psychotherapeutic techniques can help former caregivers reframe maladaptive narratives, supporting their mental health.

Maternal and Neonatal Outcomes of Gunshot Wounds in Pregnancy: A Systematic Review of Case Reports.

A systematic review was performed to compare adverse maternal and neonatal outcomes among pregnant patients with gunshot wounds (GSW) to the abdominopelvic vs other region(s) at > 20 weeks gestation. A search of Medline Ovid, Elsevier Embase, EBSCO CINAHL, and Cochrane Library in July 2022 and reference searches resulted in 1742 studies, which were screened. The 41 included studies reported outcomes for 59 pregnant patients with GSW, of which 31 (52.5%) had an isolated abdominopelvic GSW and 28 (47.5%) had an extremity, thorax, head/neck, back/spine, poly-site, or other/unknown GSW. Stillbirth occurred in 26.7% of abdominopelvic GSW and 26% of non-abdominopelvic GSW. Maternal death occurred in 3.7% of abdominopelvic GSW and 10.7% of non-abdominopelvic GSW. Neonatal death occurred in 9.1% of abdominopelvic GSW and 5.3% of non-abdominopelvic GSW. Further research is needed to standardize the approach for the evaluation and management of patients with GSW in pregnancy.

Mutational Landscape and In-Silico Analysis of TP53, PIK3CA, and PTEN in Patients with Breast Cancer from Khyber Pakhtunkhwa.

Herein, we report the mutational spectrum of three breast cancer candidate genes (TP53, PIK3CA, and PTEN) using WES for identifying potential biomarkers. The WES data were thoroughly analyzed using SAMtools for variant calling and identification of the mutations. Various bioinformatic tools (SIFT, PolyPhen-2, Mutation Taster, ISPRED-SEQ, SAAFEQ-SEQ, ConSurf, PROCHECK etc.) were used to determine the pathogenicity and nature of the SNVs. Selected interaction site (IS) mutations were visualized in PyMOL after building 3D structures in Swiss-Model. Ramachandran plots were generated by using the PROCHECK server. The selected IS mutations were subjected to molecular dynamic simulation (MDS) studies using Gromacs 4.5. STRING and GeneMANIA were used for the prediction of gene-gene interactions and pathways. Our results revealed that the luminal A molecular subtype of the breast cancer was most common, whereas a high percentage of was Her2 negatives. Moreover, the somatic mutations were more common as compared to the germline mutations in TP53, PIK3CA, and PTEN. 20% of the identified mutations are reported for the first time from Khyber Pakhtunkhwa. In the enrolled cohort, 23 mutations were nonsynonymous SNVs. The frequency of mutations was the highest in PIK3CA, followed by TP53 and PTEN. A total of 13 mutations were found to be highly pathogenic. Four novel mutations were identified on PIK3CA and one each on PTEN and TP53. SAAFEQ-SEQ predicted the destabilizing effect for all mutations. ISPRED-SEQ predicted 9 IS mutations (6 on TP53 and 3 on PIK3CA), whereas no IS mutation was predicted on PTEN. The TP53 IS mutations were TP53R43H, TP53Y73X, TP53K93Q, TP53K93R, TP53D149E, and TP53Q199X; whereas for PIK3CA, the IS mutations were PIK3CAL156V, PIK3CAM610K, and PIK3CAH1047R. Analysis from the ConSurf Web server revealed five SNVs with a highly conserved status (conservation score 9) across TP53 and PTEN. TP53P33R was found predominant in the grade 3 tumors, whereas PTENp.C65S was distributed on ER+, ER-, PR+, PR-, Her2+, and Her2- patients. TP53p.P33R mutation was found to be recurring in the 14/19 (73.6%) patients and, therefore, can be considered as a potential biomarker. Finally, these mutations were studied in the context of their potential association with different hormonal and social factors.

Network Types and Functional Health in Old Age: It is Not Just the Size of the Network That Matters.

OBJECTIVES: Findings on the effect of network size and support on functional health are mixed. We examine whether network types, that simultaneously incorporate multiple network characteristics, are associated with functional health in late life. METHODS: Data are from the National Social Life, Health, and Aging Project (N = 3005). We estimated the longitudinal effect of membership in five multidimensional network types on disability in six activities of daily living using negative binomial regression, and on mobility (assessed using a timed walk test) using a generalized linear mixed model. RESULTS: Compared to those in the large without strain network, older adults in the small, restricted, high contact network had fewer disabilities but worse mobility, while those in the large network with strain also had worse mobility. DISCUSSION: Care plans focusing on function and mobility should consider multiple aspects of older adults' social networks including network size, diversity, and relationship strain.

Phyto-fabrication of ultrafine nanoscale holmium oxide HT-Ho2O3 NPs and their biomedical potential.

In this study holmium oxide nanoparticles (Ho2O3 NPs) are fabricated using Hyphaene thebaica extracts as a bioreductant. The XRD pattern of HT-Ho2O3 NPs (product from phyto-reduction) suggested that the nanoparticles are crystalline with no impurities. Scherrer approximation revealed grain sizes of ∼10 nm. The HR-TEM revealed HT-Ho2O3 NPs possessed a quasi-spherical morphology complemented by SEM and the particle sizes were in the range of 6-12 nm. The infrared spectra revealed characteristic Ho-O bonding at ∼603 cm-1. Raman spectra indicated five main peaks positioned at 156 cm-1, 214 cm-1, 328 cm-1, 379 cm-1 and 607 cm-1. Eg (optical bandgap) was found to be 5.1 eV. PL spectra indicated two major peaks at 415 nm and 607 nm. EDS spectra confirmed the elemental presence of holmium (Ho). Spotty rings were obtained during the SAED measurement which indicated crystallinity of HT-Ho2O3 NPs. The HT-Ho2O3 NPs were further analyzed for their antioxidant, anti-angiogenic and cytotoxic properties. The antioxidant potential was moderate i.e., 43.40 ± 0.96% at 1000 µg mL-1 which decreased in a dose dependent manner. Brine shrimp lethality was highest at 1000 µg mL-1 with the LC50 320.4 µg mL-1. Moderate anti-angiogenic potential was observed using in ova CAM assay. MTT bioassay revealed that the HT-Ho2O3 NPs inhibited the 3T3 cells (IC50 67.9 µg mL-1), however, no significant inhibition was observed against MCF-7 cells. α-Amylase and ß-glucosidase inhibition revealed that the HT-Ho2O3 NPs can be of use in controlling blood glucose levels. Overall, it can be concluded that biosynthesis using aqueous extracts can be a suitable alternative in finding ecofriendly paradigms for the synthesis of nanoparticles. We suggest extended research into the bioreduced Ho2O3 NPs for establishing their biomedical potential and toxicity.

Valorization and Repurposing of Citrus limetta Fruit Waste for Fabrication of Multifunctional AgNPs and Their Diverse Nanomedicinal Applications.

Herein we propose an ecofriendly process for the biofabrication of AgNPs by applying fruit waste of Citrus limetta. The aqueous extracts from the peels of the fruit were used as green chelating and stabilizing agents. Structural, optical, vibrational, morphological, and magnetic properties were established using UV-Vis (ultraviolet visible spectroscopy), XRD (X-rays diffraction), FTIR (Fourier transformed infrared spectroscopy), EDS (energy dispersive spectroscopy), SEM (scanning electron microscopy), ESR (electron spin resonance), and PPMS (physical property management system), while the thermal properties were established using TGA/DTG (thermal gravimetric analysis/derivative thermogravimetry). XRD pattern revealed intense peaks with single-phase purity, while the Debye-Scherrer approximation revealed an average crystallite size of 33.18 nm. The W-H plot revealed the size of 55.2 nm and strain 2.68 × 10-4. FTIR spectra revealed the involvement of different functional groups and major IR vibrations were observed at 2329 cm-1, 2092 cm-1, 1794 cm-1, 1268 cm-1, and 754 cm-1. TGA/DTG revealed major weight loss events at 240 °C and 360 °C. SEM revealed spherical or quasi-spherical morphology, while EDS confirmed the presence of elemental silver. The M-H behavior for all measurement temperature shows diamagnetic behavior. Electron spin resonance (ESR) revealed a high proportion of free electrons. Furthermore, the pharmacognostic and nanomedicinal potential CL-AgNPs was established using multiple in vitro and in vivo bioassays. The in vivo wound healing assays in mice revealed excellent healing potential which were similar to positive control. The percent wound healing is reported to be 93% on the 14th day of incision after application of CL-AgNPs. Bioassays were performed to assess enzyme inhibition potential of the CL-AgNPs for Alzheimer disease and antidiabetic applications. The AChE and BChE potential of the CL-AgNPs was highest at 1000 µg mL-1, i.e., 92% and 56%, respectively. The α-glucosidase inhibition potential for the CL-AgNPs was higher as compared to the α-glucosidase, while the DPPH free radical scavenging was reported to be 70% to 11% at varying concentrations between 1000 and 62.5 µg mL-1. Overall, our results indicate that the waste fruit peels can be a sustainable and eco-friendly resource of synthesis of the multifunctional nanoparticles.

Navigating the COVID-19 pandemic together: Discussions between persons with early-stage dementia and their adult children.

OBJECTIVES: Studies have separately examined the health impacts of the COVID-19 pandemic on persons with dementia and their caregivers. Less attention has been paid to the social and emotional impacts of the pandemic in this population or how these individuals are mutually coping with the pandemic. Guided by the social citizenship theory, this qualitative study sought to characterize how persons with dementia and their adult children are coping during this time with a focus on the strengths demonstrated by persons with dementia. METHODS: Participants were 43 dyads of individuals aged 55 and older with early-stage dementia and their adult children. Discussions between parent-child dyads were recorded. Using reflexive thematic analysis, themes related to social and emotional impacts of the pandemic and coping strategies were identified. RESULTS: Adult children shared with their parents how the pandemic resulted in reduced social engagement and challenging work arrangements. Dyads described how the pandemic positively impacted their relationship, allowing some of them to spend more time together. In coping with the pandemic, adult children provided instrumental support to their parents and parents reciprocated with emotional support. Participants also coped by making meaning of their situation during discussions. CONCLUSIONS: Findings characterize the resilience of persons with dementia and the mutuality of the relationship between both members of the care partner dyad, as both parents and adult children offered support to one another. Facilitating dyadic discussions may be a cost-effective way to sustain social connections and offer ongoing coping support through the pandemic or other challenging circumstances.

Physicochemical and nanomedicine applications of phyto-reduced erbium oxide (Er2O3) nanoparticles.

Hyphaene thebaica fruits were used for the fabrication of spherical erbium oxide nanoparticles (HT-Er2O3 NPS) using a one-step simple bioreduction process. XRD pattern revealed a highly crystalline and pure phase with crystallite size of ~ 7.5 nm, whereas, the W-H plot revealed crystallite size of 11 nm. FTIR spectra revealed characteristic Er-O atomic vibrations in the fingerprint region. Bandgap was obtained as 5.25 eV using K-M function. The physicochemical and morphological nature was established using Raman spectroscopy, reflectance spectroscopy, SAED and HR-TEM. HT-Er2O3 NPS were further evaluated for antidiabetic potential in mice using in-vivo and in-vitro bioassays. The synthesized HT-Er2O3 NPS were screened for in vitro anti-diabetic potentials against α-glucosidase enzyme and α-amylase enzyme and their antioxidant potential was evaluated using DPPH free radical assay. A dose dependent inhibition was obtained against α-glucosidase (IC50 12 µg/mL) and α-amylase (IC50 78 µg/mL) while good DPPH free radical scavenging potential (IC50 78 µg mL-1) is reported. At 1000 µg/mL, the HT-Er2O3 NPS revealed 90.30% and 92.30% inhibition of α-amylase and α-glucosidase enzymes. HT-Er2O3 NPs treated groups were observed to have better glycemic control in diabetic animals (503.66 ± 5.92*** on day 0 and 185.66 ± 2.60*** on day 21) when compared with positive control glibenclamide treated group. Further, HT-Er2O3 NPS therapy for 21 days caused a considerable effect on serum total lipids, cholesterol, triglycerides, HDL and LDL as compared to untreated diabetic group. In conclusion, our preliminary findings on HT-Er2O3 NPS revealed considerable antidiabetic potential and thus can be an effective candidate for controlling the post-prandial hyperglycemia. However, further studies are encouraged especially taking into consideration the toxicity aspects of the nanomaterial.

"Been there, done that:" A grounded theory of future caregiver preparedness in former caregivers of parents living with dementia.

BACKGROUND: Family caregivers offer essential support to persons living with dementia (PLWD). Providing care for more than one family member or close other across adulthood is becoming increasingly common, yet little is known about the ways that caregiving experiences shape caregiver preparedness. The current study presents a grounded theory of future caregiver preparedness in former caregivers of PLWD. METHOD: A coding team (five coders and two auditors) used Consensual Qualitative Research and grounded theory techniques to analyze transcripts from 32 semi-structured interviews with midlife former caregivers of parents who died following advanced Alzheimer's disease and related dementias. RESULTS: Qualitative analysis revealed two dimensions of future caregiver preparedness: caregiving confidence and caregiving insights. Narratives from caregiving experiences informed participants' descriptions of their future caregiver preparedness. Though some former caregivers described a positive (i.e., boosted or sustained) sense of caregiving confidence following care for their parents, others described a diminished (i.e., restricted or impeded) sense of confidence. Regardless of their confidence, all caregivers described specific caregiving insights related to one or more categories (i.e., caregiving self-conduct, care systems and resources, and relating with a care partner). CONCLUSIONS: Preparedness for future caregiving following recent care for a PLWD varies: For some, past experiences appear to offer cumulative advantages in anticipating future care roles, whereas for others, past experiences may contribute to apprehension towards, or rejection of, future care roles. Entering new caregiving roles with diminished confidence may have negative consequences for caregivers' and care partners' wellbeing. Multidimensional assessment of future caregiver preparedness in former caregivers of PLWD may support development of resources for former caregivers entering new caregiving roles.

Institutional Racism and Health: a Framework for Conceptualization, Measurement, and Analysis.

Despite growing interest in the health-related consequences of racially discriminatory institutional policies and practices, public health scholars have yet to reach a consensus on how to measure and analyze exposure to institutional racism. The purpose of this paper is to provide an overview of the conceptualization, measurement, and analysis of institutional racism in the context of quantitative research on minority health and health disparities in the United States. We begin by providing definitions of key concepts (e.g., racialization, racism, racial inequity) and describing linkages between these ideas. Next, we discuss the hypothesized mechanisms that link exposure to institutional racism with health. We then provide a framework to advance empirical research on institutional racism and health, informed by a literature review that summarizes measures and analytic approaches used in previous studies. The framework addresses six considerations: (1) policy identification, (2) population of interest, (3) exposure measurement, (4) outcome measurement, (5) study design, and (6) analytic approach. Research utilizing the proposed framework will help inform structural interventions to promote minority health and reduce racial and ethnic health disparities.

Activities of Daily Living Needs and Support in Adult Child-Parent Dyads.

This study examined whether changes in middle-aged children's perceptions of their parents' activities of daily living needs (ADL needs) were associated with changes in the mutuality of support in their relationship. A group of 366 middle-aged children in Waves 1 (2008) and 2 (2013) of the Family Exchanges Study self-reported providing and receiving tangible, emotional, and informational support to and from their n = 468 parents. Increased perceived parental ADL needs were associated with increased provision of tangible and informational support to parents but not with changes in support received. Increases in perceived parental ADL needs were associated with higher incongruence for all three support types (the child providing more support than they receive).

Green Nano-Biotechnology: A New Sustainable Paradigm to Control Dengue Infection.

Dengue is a growing mosquito-borne viral disease prevalent in 128 countries, while 3.9 billion people are at high risk of acquiring the infection. With no specific treatment available, the only way to mitigate the risk of dengue infection is through controlling of vector, i.e., Aedes aegypti. Nanotechnology-based prevention strategies like biopesticides with nanoformulation are now getting popular for preventing dengue fever. Metal nanoparticles (NPs) synthesized by an eco-friendly process, through extracts of medicinal plants have indicated potential anti-dengue applications. Green synthesis of metal NPs is simple, cost-effective, and devoid of hazardous wastes. The recent progress in the phyto-synthesized multifunctional metal NPs for anti-dengue applications has encouraged us to review the available literature and mechanistic aspects of the dengue control using green-synthesized NPs. Furthermore, the molecular bases of the viral inhibition through NPs and the nontarget impacts or hazards with reference to the environmental integrity are discussed in depth. Till date, major focus has been on green synthesis of silver and gold NPs, which need further extension to other innovative composite nanomaterials. Further detailed mechanistic studies are required to critically evaluate the mechanistic insights during the synthesis of the biogenic NPs. Likewise, detailed analysis of the toxicological aspects of NPs and their long-term impact in the environment should be critically assessed.

Social participation and marital satisfaction in mid to late life marriage.

Objectives: Research shows that social participation is beneficial for overall health and well-being. Yet, no research to our knowledge has examined whether social participation is associated with greater marital satisfaction in middle-aged and older couples. We hypothesized that middle-aged and older adults would have greater marital satisfaction when their spouse engaged in social groups because there would be greater opportunity for self-expansion and for social support from ties outside the marriage. Methods: We used background self-report data from a multi-method study of 98 middle-aged and older adult married couples (N = 196) with chronic conditions. As part of the study, spouses completed questionnaires that measured the frequency and intensity of involvement in social groups (e.g., church, business groups). Marital satisfaction was measured with the Locke Wallace Marital Adjustment Test. Results: Contrary to our hypotheses, results from actor-partner interdependence models provided no evidence that one's own social participation was associated with one's own marital satisfaction (actor effects). However, in line with our hypotheses regarding partner effects, one spouse's (a) report of any social participation with church organizations, business groups, or social groups, (b) greater number of affiliations with different organizations, (c) greater frequency of participation, and (d) being an active officer in a social organization were significantly associated with the other spouse's greater marital satisfaction. Discussion: Findings of this study suggest that having a spouse who participates in social groups is good for relationship satisfaction in mid to late life marriage.

Patterns of Caregiving Among Older Adults With and Without Dementia: A Latent Class Analysis.

OBJECTIVES: We identify common patterns of caregiving or "care types" among older adults with and without dementia. Prior research has focused on primary caregivers and on the independent effects of individual caregiving attributes. We examine multiple caregivers of older adults, including the primary caregiver, and how multiple caregiving attributes co-occur to shape caregiving types. METHODS: We link 2015 care recipient (N = 1,423) and unpaid caregiver data (N = 2,146) from the National Health and Aging Trends Study and the National Study of Caregiving. Latent class analysis of caregiving attributes, representing care intensity and regularity, and various care activities, was used to construct care types. Multinomial logistic regression was used to examine if the recipients' dementia status and caregivers' background characteristics predicted membership in care types. RESULTS: Five distinguishable care types were identified. Caregivers who were female, adult children, or coresidents, those caring for persons with dementia, and those who had paid help had higher odds of being in the more demanding care types. Conversely, older, White caregivers and those with support for their caregiving activities were less likely to be in a demanding care type. DISCUSSION: Care types can help us understand sources of heterogeneity in caregiving and effectively target caregiver support services and interventions.

Multidimensional Social Network Types and Their Correlates in Older Americans.

BACKGROUND AND OBJECTIVES: Social support networks of older adults have been linked to their health and well-being; however, findings regarding the effects of specific network characteristics have been mixed. Additionally, due to demographic shifts increasing numbers of older adults live outside of traditional family structures. Previous studies have not systematically examined the resulting complexity and heterogeneity of older adults' social networks. Our objectives were to examine this complexity and heterogeneity by developing a multidimensional typology of social networks that simultaneously considers multiple structural and functional network characteristics, and to examine differences in network type membership by sociodemographic characteristics, health characteristics, and birth cohort. RESEARCH DESIGN AND METHODS: Participants included 5,192 adults aged 57-85 years in the National Social Life, Health, and Aging Project at rounds 1 (2005-2006) and 3 (2015-2016). Data were collected on social relationships including network size, diversity, frequency of contact, and perceived support and strain in relationships. We used latent class analysis to derive the network typology and multinomial logistic regression to examine differences in network type membership by sociodemographic characteristics, health characteristics, and birth cohort. RESULTS: Older adults were classified into 5 distinct social network types: (i) large, with strain; (ii) large, without strain; (iii) small, diverse, low contact; (iv) small, restricted, high contact; and (v) medium size and support. Membership in these network types varied by age, gender, marital status, race/ethnicity, education, mental health, and birth cohort. DISCUSSION AND IMPLICATIONS: Network typologies can elucidate the varied interpersonal environments of older adults and identify individuals who lack social connectedness on multiple network dimensions and are therefore at a higher risk of social isolation.